181800002 has 8 divisors (see below), whose sum is σ = 272864700. Its totient is φ = 90845104.

The previous prime is 181799993. The next prime is 181800061. The reversal of 181800002 is 200008181.

It can be written as a sum of positive squares in 2 ways, for example, as 177715561 + 4084441 = 13331^2 + 2021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23177 + ... + 30012.

Almost surely, 2^181800002 is an apocalyptic number.

181800002 is a deficient number, since it is larger than the sum of its proper divisors (91064698).

181800002 is a wasteful number, since it uses less digits than its factorization.

181800002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54900.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 181800002 is about 13483.3231067122. The cubic root of 181800002 is about 566.4974525127.

Adding to 181800002 its reverse (200008181), we get a palindrome (381808183).

The spelling of 181800002 in words is "one hundred eighty-one million, eight hundred thousand, two".